Asked if he wanted to return to the Knicks next season, Prigioni, the oldest rookie in the modern NBA at 35, said he can’t tell and needs a full season to evaluate. But Prigioni told The Post he is not retiring. “I will play for some team next year — where, I don’t know,’’ Prigioni told The Post. “It could be in the NBA. It could be the Spanish League.’’ “I need to go to the summer, take it by day-by-day and think about it. But I [will] listen to the Knicks.’’ New York Post